This file is indexed.

/usr/share/initramfs-tools/scripts/touch is in initramfs-tools-ubuntu-touch 0.72.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
# Local filesystem mounting			-*- shell-script -*-

pre_mountroot()
{
	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-top"
	run_scripts /scripts/local-top
	[ "$quiet" != "y" ] && log_end_msg
}

sync_dirs() {
	base=$1
	source=$2
	target=$3

	OLD_PWD=$PWD
	cd $base

	for file in $source/*
	do
		# Skip empty directories
		[ ! -e "$base/$file" ] && continue

		# If the target already exists as a file or link, there's nothing we can do
		[ -e "$target/$file" -o -L "$target/$file" ] && [ ! -d "$target/$file" ] && continue

		# If the target doesn't exist, just copy it over
		if [ ! -e "$target/$file" -a ! -L "$target/$file" ]; then
			cp -Ra "$base/$file" "$target/$file"
			continue
		fi

		# That leaves us with directories and a recursive call
		[ -d $file ] && sync_dirs $base $file $target
	done

	cd $OLD_PWD
}

mountroot()
{
	# list of possible userdata partition names
	partlist="userdata UDA DATAFS USERDATA"

	pre_mountroot

	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-premount"
	run_scripts /scripts/local-premount
	[ "$quiet" != "y" ] && log_end_msg

	# Mount root
	#
	# Create a temporary mountpoint for the bindmount
	mkdir -p /tmpmnt

	# Make sure the device has been created by udev before we try to mount
	udevadm settle

	# find the right partition
	for partname in $partlist; do
		part=$(find /dev -name $partname|tail -1)
		[ -z "$part" ] && continue
		path=$(readlink -f $part)
		[ -n "$path" ] && break
	done

	# override with a possible cmdline parameter
	if grep -q datapart= /proc/cmdline; then
		for x in $(cat /proc/cmdline); do
			case ${x} in
			datapart=*)
				path=${x#*=}
				;;
			esac
		done
	fi

	if [ -z "$path" ]; then
		echo "initrd: Couldn't find data partition. Spawning adbd ..." >/dev/kmsg || true
		panic "Couldn't find data partition. Spawning adbd ..."
	fi
	echo "initrd: mounting $path" >/dev/kmsg || true

	# Mount the data partition to a temporary mount point
	mount -o discard $path /tmpmnt

	# Loop-mounted flipped model
	if [ -e /tmpmnt/system.img ]; then
		# Transition .developer_mode to .writable_image
		[ -e /tmpmnt/.developer_mode ] && mv /tmpmnt/.developer_mode /tmpmnt/.writable_image

		# Prepare the root filesystem
		# NOTE: We mount it read-write in all cases, then remount read-only.
		#       This is to workaround a behaviour change in busybox which now
		#       uses read-only loops if the fs is initially mounted read-only.
		#       An alternative implementation would be to add losetup support
		#       to busybox and do the mount in two steps (rw loop, ro fs).
		mount -o loop,rw /tmpmnt/system.img ${rootmnt}
		if [ -e /tmpmnt/.writable_image ]; then
			echo "initrd: mounting system.img (image developer mode)" >/dev/kmsg || true
			mountroot_status="$?"
		else
			echo "initrd: mounting system.img (user mode)" >/dev/kmsg || true
			mount -o remount,ro ${rootmnt}
			mountroot_status="$?"
		fi
		mount --move /tmpmnt ${rootmnt}/userdata

		# Mount the android system partition to a temporary location
		mkdir -p /android-system
		mount -o loop,ro ${rootmnt}/var/lib/lxc/android/system.img /android-system

		# Get device information
		device=$(grep ^ro.product.device= /android-system/build.prop |sed -e 's/.*=//')
		[ -z "$device" ] && device="unknown"
		echo "initrd: device is $device" >/dev/kmsg || true

		# Mount some tmpfs
		mkdir -p ${rootmnt}/android
		mount -o rw,size=4096 -t tmpfs none ${rootmnt}/android
		mount -o rw,nosuid,noexec,relatime,mode=755 -t tmpfs tmpfs ${rootmnt}/run

		# Create some needed paths on tmpfs
		mkdir -p ${rootmnt}/android/data ${rootmnt}/android/system

		# Prepare the fstab
		FSTAB=${rootmnt}/etc/fstab
		touch ${rootmnt}/run/image.fstab
		mount -o bind ${rootmnt}/run/image.fstab $FSTAB || panic "drop to adb"
		echo "/dev/root / rootfs defaults,ro 0 0" >> $FSTAB

		# Process the list of bind-mounts
		# (but don't mount them, mountall will do it)
		cat ${rootmnt}/etc/system-image/writable-paths | while read line; do
			set -- $line
			# Skip invalid/commented entries
			([ -z "$1" ] || [ -z "$2" ] || [ -z "$3" ] || [ -z "$4" ] || [ -z "$5" ]) && continue
			[ "$1" = "#" ] && continue

			# Skip invalid mount points
			dstpath="${rootmnt}/$1"
			[ ! -e "$dstpath" ] && continue

			if [ "$3" = "temporary" ]; then
				# Temporary entries are simple, just mount a tmpfs
				echo "tmpfs $1 tmpfs $5 0 0" >> $FSTAB
			elif [ "$3" = "persistent" ] || [ "$3" = "synced" ]; then
				# Figure out the source path
				if [ "$2" = "auto" ]; then
					srcpath="${rootmnt}/userdata/system-data/$1"
					path="/userdata/system-data/$1"
				else
					srcpath="${rootmnt}/userdata/$2"
					path="/userdata/$2"
				fi

				if [ ! -e "$srcpath" ]; then
					# Process new persistent or synced paths
					dstown=$(stat -c "%u:%g" $dstpath)
					dstmode=$(stat -c "%a" $dstpath)
					mkdir -p ${srcpath%/*}
					if [ ! -d "$dstpath" ]; then
						# Deal with redirected files
						if [ "$4" = "transition" ]; then
							cp -a $dstpath $srcpath
						else
							touch $srcpath
							chown $dstown $srcpath
							chmod $dstmode $srcpath
						fi
					else
						# Deal with redirected directories
						if [ "$4" = "transition" ] || [ "$3" = "synced" ]; then
							cp -aR $dstpath $srcpath
						else
							mkdir $srcpath
							chown $dstown $srcpath
							chmod $dstmode $srcpath
						fi
					fi
				elif [ "$3" = "synced" ]; then
					# Process existing synced paths
					sync_dirs $dstpath . $srcpath
				fi

				# Write the fstab entry
				if [ "$5" = "none" ]; then
					echo "$path $1 none bind 0 0" >> $FSTAB
				else
					echo "$path $1 none bind,$5 0 0" >> $FSTAB
				fi
			else
				continue
			fi
		done

		# Extract the fstab from the android initrd
		# NOTE: we should find a faster way of doing that or cache it
		OLD_CWD=$(pwd)
		mount -n -t tmpfs tmpfs ${rootmnt}/var/lib/lxc/android/rootfs
		cd ${rootmnt}/var/lib/lxc/android/rootfs
		cat /android-system/boot/android-ramdisk.img | gzip -d | cpio -i
		cd $OLD_CWD

		# Mount all the Android partitions
		cat ${rootmnt}/var/lib/lxc/android/rootfs/fstab* | while read line; do
			set -- $line

			# Skip any unwanted entry
			echo $1 | egrep -q "^#" && continue
			([ -z "$1" ] || [ -z "$2" ] || [ -z "$3" ] || [ -z "$4" ]) && continue
			([ "$2" = "/system" ] || [ "$2" = "/data" ]) && continue

			label=$(echo $1 | awk -F/ '{print $NF}')
			[ -z "$label" ] && continue

			echo "initrd: checking mount label $label" >/dev/kmsg || true

			for dir in by-partlabel by-name by-label by-path by-uuid by-partuuid by-id; do
				path="/dev/disk/$dir/$label"
				[ -e "$path" ] && break
			done

			# MTD based devices, such as the emulator
			if [ ! -e "$path" ] && echo $label | egrep -q "^mtdblock"; then
				path="/dev/$label"
			fi

			[ ! -e "$path" ] && continue

			mkdir -p ${rootmnt}/android/$2
			echo "initrd: mounting $path as ${rootmnt}/android/$2" >/dev/kmsg || true
			mount $path ${rootmnt}/android/$2 -t $3 -o $4
		done

		# system is a special case
		echo "initrd: mounting ${rootmnt}/var/lib/lxc/android/system.img as ${rootmnt}/android/system" >/dev/kmsg || true
		mount --move /android-system ${rootmnt}/android/system

		# Apply device-specific udev rules
		if [ "$device" != "unknown" ]; then
			mount --bind ${rootmnt}/usr/lib/lxc-android-config/70-$device.rules ${rootmnt}/lib/udev/rules.d/70-android.rules
		fi

		# Bind-mount /lib/modules from Android
		[ -e ${rootmnt}/android/system/lib/modules ] && mount --bind ${rootmnt}/android/system/lib/modules ${rootmnt}/lib/modules

		# Bind-mount /var/lib/ureadahead if available on persistent storage
		# this is required because ureadahead runs before mountall
		if [ -e ${rootmnt}/userdata/system-data/var/lib/ureadahead ] && \
				[ -e ${rootmnt}/var/lib/ureadahead ]; then
			mount --bind ${rootmnt}/userdata/system-data/var/lib/ureadahead ${rootmnt}/var/lib/ureadahead
		fi

		# Setup the swap device
		[ -e ${rootmnt}/userdata/SWAP.img ] && swapon ${rootmnt}/userdata/SWAP.img

		# Apply customized content
		for user in ${rootmnt}/userdata/user-data/*
		do
			if [ -d ${rootmnt}/custom/home ] && [ ! -e "$user/.customized" ]; then
				echo "initrd: copying custom content tp " >/dev/kmsg || true
				cp -Rap ${rootmnt}/custom/home/* "$user/"
				cp -Rap ${rootmnt}/custom/home/.[a-zA-Z0-9]* "$user/"
				touch "$user/.customized"
				dstown=$(stat -c "%u:%g" "$user")
				chown -R $dstown "$user/"
			fi
		done


	# Old flipped model
	elif [ -d /tmpmnt/ubuntu ]; then
		mount --bind /tmpmnt/ubuntu ${rootmnt}
		mountroot_status="$?"

	# Possibly a re-partitioned device
	else
		echo "initrd: Couldn't find a system partition." >/dev/kmsg || true
		panic "Couldn't find a system partition. Spawning adbd ..."
	fi

	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-bottom"
	run_scripts /scripts/local-bottom
	[ "$quiet" != "y" ] && log_end_msg
}